import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Gao zhao xu
 * Date: 2023-06-13
 * Time: 8:13
 */
public class test {
    public String toLowerCase(String s) {
        String new_s = "";
        for (int i = 0; i < s.length(); i++){
            char ch = s.charAt(i);
            if (ch >= 'A' && ch <= 'Z'){
                ch += 32;
                new_s += ch;
            }else{
                new_s += ch;
            }
        }
        return new_s;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String s = input.nextLine();
        String new_s = "";
        for (int i = 0; i < s.length(); i++){
            char ch = s.charAt(i);
            if (ch >= 'A' && ch <= 'Z'){
                ch += 32;
                new_s += ch;
            }else{
                    new_s += ch;
            }
        }
        System.out.println(new_s);
    }
}
